The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 23, 1988
Filed:
Dec. 14, 1984
Applicant:
Inventor:
Tim A Williams, Austin, TX (US);
Assignee:
Motorola, Inc., Schaumburg, IL (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F / ; G05F / ;
U.S. Cl.
CPC ...
364768 ; 364715 ;
Abstract
In a digital signal processing system, a logarithmic arithmetic logic unit which selectively performs multiply/accumulate operations of operands in logarithmic number representation. Direct feed through of operands through an adder/subtractor circuit, even when an addition or subtraction is not effected, eliminates external bypass circuitry. A method for adding and subtracting operands in logarithmic number representation. An adder/subtractor circuit which efficiently effects addition and subtraction of operands in logarithmic number representation over a wide dynamic range.